Better or advised configuration approach for Optimus based systems

Adam Williamson awilliam at
Tue Nov 22 15:54:19 UTC 2011

On Tue, 2011-11-22 at 13:29 +0100, Gianluca Cecchi wrote:

> What about i915_enable_rc6 not being the default...? Does still put
> stability problems? Does it make sense to enable it or not by default
> based on different adapters/chipsets?
> In my case it gives me about 1hour and a half of battery life more....

modinfo asserts:

parm:           i915_enable_rc6:Enable power-saving render C-state 6
(default: true) (int)

are you sure it's *not* the default?

> - What should I do with nouveau kernel module?
> Should I put inside boot option also something like nouveau.nomodeset=0 ?
> At this time I have nouveau loaded, but nvidida adapter disabled (with
> acpi_call)

Not sure, but one suggestion I would have would be to disable the NVIDIA
adapter via the BIOS if that's at all possible. That should result in
the simplest configuration.

> BTW: is the Intel driver in Fedora 16 currently built with
> "--enable-sna" option or planned to be ?

>From the looks of the spec, no:

%configure --disable-static --libdir=%{_libdir} --mandir=%{_mandir}
--enable-dri --enable-xvmc
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | adamwfedora

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